Sökning: "ion flotation"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden ion flotation.

  1. 1. On metal ion chelates and conditional stability constant determination : Method development and selective ion flotation of chelating surfactants

    Författare :Susanne Boija; Magnus Norgren; Håkan Edlund; Erik Hedenström; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  3. 2. Fundamental Characterization and Technical Aspects of a Chelating Surfactant

    Författare :Ida Svanedal; Håkan Edlund; Magnus Norgren; Krister Holmberg; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; chelating surfactant; DTPA based surfactant; pH-responsive; characterization; surface tension; NMR diffusometry; conditional stability constants; interaction parameter; ion flotation;

    Sammanfattning : The purpose of this study was to investigate the fundamental characteristics of a chelating surfactant in terms of solution behaviour, chelation of divalent metal ions, and interaction in mixtures with different foaming agents and divalent metal ion, as well as examining its prospects in some practical applications. Chelating surfactants are functional molecules, with both surface active and chelating properties, which are water soluble and therefore suitable for chelation in many aqueous environments. LÄS MER

  4. 3. Pulp chemistry of sulphide froth flotation

    Författare :Bertil Pålsson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Sammanfattning : The pulp chemistry of chalcopyrite, galena and sphalerite is analyzed theoretically, with computer-aided modelling, and practically with ion chromatography. Ion chromatography is used for analyzing the inorganic and organic anion chemistry of sulphide flotation. LÄS MER

  5. 4. Design and Development of Mineral Structure Specific Collectors in Flotation

    Författare :Tommy Karlkvist; Beena Rai; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Sammanfattning : The success of mineral flotation processes depends on the hydrophobization of the surface for the desired mineral particles whilst keeping, or making, all other minerals hydrophilic. This is achieved by adding several reagents to the flotation pulp to adsorb selectively at the mineral/water interface. LÄS MER

  7. 5. The chemistry of flotation activation and depression of iron-containing sulphide minerals

    Författare :Xianghuai Wang; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Sammanfattning : Thermodynamic calculations, electrochemical techniques, flotation and adsorption tests were used to study the physico-chemical principles involved in the flotation, activation and depression of the common ironcontaining sulphide minerals. Thermodynamic calculations on iron-xanthate-sulphur-water systems indicate that insoluble ferric hydroxo- xanthates can be obtained at a very low xanthate concentration in the neutral to weakly alkaline pH range, in which no liquid dixanthogen is formed. LÄS MER